Best suited for adult birds. Made of strong, heavy-duty plastic. Large lid removes for easy filling and cleaning. Internal float mechanism automatically controls water flow. For best results, set waterer on flat ground before filling. Accommodates up to 40 chickens, also good for ducks or other poultry. Holds up to 8 gallons/30 liters of water. | Little Giant 8-Gallon Deluxe Dome Chicken Waterer | Size 8 gal